Adolph henry bobb



' on the line 22 of Fig. 1.

UNITED STATES PATENT OFFICE. j

ADOLPH HENRY BOBB, OF NEW YORK, N. Y.

METALLIC 000 SPECIFICATION forming part of Letters Patent No. 537,337, dated April 9, 1895.

Application filed February 19, 18 95. Serial No. 538,960 (No model.) v

To all whom it may concern:

Be it known that I, ADOLPH HENRY BOBB, of New York city, in the county and State of New York, have invented a new and Im proved Metallic Door, of which-the following is a full, I

clear, and exact description.

The object of the invention is to provide a new and improved metallic door, designed for use in dwellings and other buildings,arranged to combine great durability and strength with lightness, is not liable to warp and shrink as the ordinary wooden doors now in use, and is also comparatively cheap to manufacture, and completely fire proof.

The invention consists principally of two sheet metal plates, formed at their sides and ends with flanges connected with each other, each plate being also provided with flanges projecting inwardly from the walls of the panel apertures, and a central plate connected with the said panel flanges.

The invention also consists of certain parts and details, and combinations of the same, as will be fully described hereinafterand then pointed out in the, claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 is aface view of the improvement. Fig. 2 is a sectional plan view of the same, Fig. 3 is a face view of one of the panels, with the trimming removed. Fig. 4is an enlarged sectional plan view of the door seam; and Fig. 5 is a like View of the molding seam.

The improved door is provided with two sheet metal plates A and A, forming the inner and outer faces of the door, as indicated in Fig.2, the said plates being provided at their sides and ends with integral flanges A and A, connected with each other by an inside seam so as to hold the front and rear plates a suitable distance apart. By having the seams on the inside, only a line joint is visible on the outside, and this joint is easily covered up when painting the door. The plates are provided with registering panel apertures A", and each aperture in the plate A is provided at its wall with an inwardlyextending L-shaped flange A and similar flanges A are formed in the apertures of the plate A. The flanges A and A are riveted or otherwise secured to a central plate B, likewise made of sheet metal, and arranged inside the two plates A and A, as will be readily understood by reference to Fig. 2.

The corners of the panel apertures A are suitably fitted with trimmings 0, made of sheet metal and riveted at their outer ends to the plates A, A,and connected at their inner ends by seams with the flanges A and A The ends of the trimmings or moldings are mitered to present a neat appearance.

In order to render the door completely fire proof, I prefer to fill the interior thereof between the plates A and A with asbestos or other suitable fire proof material, the latter being filled in at one end of the door previous to closing the corresponding flanges A and A It will be seen that adoor constructed in this manner can be very cheaply manufactured and the several parts easily fitted together to form the door, which is comparatively light, but very strong, durable and fire proof.

Having thus fully described my invention, I claim as new and desire to secure byLetters Patent- 1. A metal door, comprising sheet metal plates connected with each other and forming the inside and outside of the door, a

central plate between the same, and flanges extending from the walls of the panel. apertures, onto the said central plate and fastened thereto, substantially as shown and de-- scribed. 2. A metal door, comprising two sheet metal plates formed at their sides and ends with flanges connected with each other, each plate being provided with L-shaped flanges projecting inwardly from the walls of the panel apertures in the plate, and a central plate connected with the said panel flanges, substantially as shown and described.

3. A metal door, comprising two sheet metal plates formed at their sides and ends with flanges connected with each other, each plate being provided with L-sliaped flanges projecting inwardly from the walls of the panel apertures in the plate, a central plate con- 5 nected with the said panel flanges, and metallic trimmings secured in the panel apertures between the first named plates and the same? central plate, substantially as shown and de scribed.

ADOLPH HENRY BOBB.

Witnesses:

THEO. G. HOSTER, J NO. M. RITTER. 

